"I regard consciousness as fundamental. I regard matter as derivative from consciousness. We cannot get behind consciousness. Everything that we talk about, everything that we regard as existing, postulates consciousness (1931). Science cannot solve the ultimate mystery of nature. And that is because, in the last analysis, we ourselves are part of nature and therefore part of the mystery that we are trying to solve (1932). We have no right to assume that any physical laws exist, or if they have existed up to now, that they will continue to exist in a similar manner in the future (1931)." Max Planck